Additional weapons have infinite ammo, which makes them uniquely serviceable in situations when you've run out of ammo for your primary weapon. They don't do a lot of damage, so it's better to use them when your enemy has already taken serious damage. When you reach a high enough level, you can purchase an upgrade for your additional weapon, increasing the damage it does. You don't need parts for that; just Gunbucks.
Have more questions? Submit a request